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Launched October 14, 2026
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A browser built for focused work
SigmaOS is a web browser for Mac designed around focused work. It is aimed at people who keep many tabs open and want a more organized way to manage them than a single row of tabs. Tabs are shown vertically and grouped into separate workspaces, so research, projects and personal browsing stay apart. SigmaOS treats tabs like items on a to-do list: they can be marked as done when finished or locked to keep them around. A split view lets users work on two websites side by side, and the browser includes AI features for summarizing and asking questions about pages.
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